| GaAs量子环中类氢杂质能量的研究 |
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| 引用本文： | 惠萍.GaAs量子环中类氢杂质能量的研究[J].广东教育学院学报,2010(5):51-56. |
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| 作者姓名： | 惠萍 |
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| 作者单位： | 广东第二师范学院物理系,广东广州510303 |
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| 基金项目： | 国家自然科学基金资助项目（10874122）; 广东省自然科学基金资助项目（8151030301）; 广东第二师范学院教授博士专项经费资助项目 |
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| 摘 要： | 利用B样条技术研究GaAs量子环中类氢杂质能量的量子尺寸效应.对计算结果比较看到：无磁场情况,对于｜m｜=0,r0〈75 nm,抛物禁闭关联势可以近似作为微扰项来处理;对于｜m｜≥0,r0〈60 nm,不可以采用微扰法.当r0〉90 nm时,库仑势可以近似作为微扰项来处理,但误差很大.当磁场B增加时,类氢杂质能量的量子尺寸效应出现明显变化,当r0〉90 nm时,量子环中类氢杂质能量快速上升.
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| 关 键 词： | B样条技术 量子环 类氢杂质 |
A Study of Hydrogenlike Impurity Energies in GaAs Quantum Ring |
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| HUI Ping.A Study of Hydrogenlike Impurity Energies in GaAs Quantum Ring[J].Journal of Guangdong Education Institute,2010(5):51-56. |
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| Authors: | HUI Ping |
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| Institution: | HUI Ping(Department of Physics,Guangdong University of Education,Guangzhou,Guangdong,510303,P.R.China) |
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| Abstract: | Hydrogenlike impurity energy size-dependent effect in GaAs quantum ring is studied by B-spline technique.The calculated results show that in the zero magnetic field,when ｜m｜=0 and r075 nm,parabolic potential across item can be taken as perturbation.When ｜m｜≥1 and r060 nm,the perturbation method cannot be used.Whenr090 nm,the Coulomd potential can be taken as perturbation,but the error is large.As magnetic field strength B increases,Hydrogenlike impurity energy size-dependent effect in GaAs quantum ring changes violently.When r090 nm,the energy increases quickly as quantum ring radius r0 increases. |
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| Keywords: | B-spline technique quantum ring Hydrogenlike impurity |
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